/* vim:set ts=2 sw=2 sts=2 et: */
/**
 * \author     Marcus Holland-Moritz (github@mhxnet.de)
 * \copyright  Copyright (c) Marcus Holland-Moritz
 *
 * This file is part of dwarfs.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the “Software”), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * SPDX-License-Identifier: MIT
 */

#include <dwarfs/file_view.h>
#include <dwarfs/mapped_byte_buffer.h>

namespace dwarfs {

namespace {

class mapped_byte_buffer_impl : public byte_buffer_interface {
 public:
  mapped_byte_buffer_impl(std::span<uint8_t const> data, file_view const& mm)
      : data_{data}
      , mm_{mm} {}

  size_t size() const override { return data_.size(); }

  size_t capacity() const override { return data_.size(); }

  uint8_t const* data() const override { return data_.data(); }

  std::span<uint8_t const> span() const override {
    return {data_.data(), data_.size()};
  }

 private:
  std::span<uint8_t const> data_;
  file_view mm_;
};

} // namespace

shared_byte_buffer
mapped_byte_buffer::create(std::span<uint8_t const> data, file_view const& mm) {
  return shared_byte_buffer{
      std::make_shared<mapped_byte_buffer_impl>(data, mm)};
}

} // namespace dwarfs
